Final answer:
Matt Hagan won his third world championship in 2019 in the Funny Car division of the NHRA racing circuit. Funny Cars are customized for drag racing with powerful engines and carbon fiber bodies.
Step-by-step explanation:
In 2019, Matt Hagan raced to the winner's circle four times and won his third world championship in the Funny Car division of the National Hot Rod Association (NHRA) racing circuit. The Funny Car category is one of the four professional classes in the NHRA, alongside Top Fuel, Pro Stock, and Pro Stock Motorcycle. These high-powered vehicles are known for their characteristic carbon fiber bodies and tilted-up bodies, which resemble mass-produced vehicles but are completely custom-built for drag racing with extremely powerful engines capable of high speeds in a quarter-mile drag race.